MyFitnessPal 2018 Data Breach
ObscureIQ Breach Intelligence
Low SeverityWebsite / service breach
MyFitnessPal Fitness Tracking App Breach (2018): 150 Million User Accounts Including Passwords Exposed
Fitness tracking app.
Verified by ObscureIQ Intelligence
23/100Breach Risk Index
5Data Value
25Market Recency
512dSince Breach
Breach Intelligence Summary
Entity: MyFitnessPal · Actor: Unknown · Sources: 8 references
Attack: Misconfiguration
Profile: Platform · Fitness tracking and nutrition · Health and wellness app · Global
Timeline: Breach (2018-02-01) · Indexed (Dec 01, 2024) · Year (2018)
Exposure: 150.6M records · 4 fields: Email Address, IP Address, Password, Username
Status: Confirmed
Executive Summary
MyFitnessPal, owned by Under Armour at the time, suffered a data breach in February 2018 when an unauthorized party gained access to user account data. The breach exposed records tied to approximately 150 million users. The attack vector was a misconfiguration, meaning a security flaw in how the system was set up allowed direct access to the data rather than requiring a sophisticated external hack. The stolen data later appeared for sale on a dark web marketplace in 2019 and began circulating more broadly from there. The breach exposed email addresses, usernames, IP addresses, and passwords. Passwords for older accounts were stored using SHA-1 hashing, a weaker method that makes cracking them more feasible. Newer accounts used bcrypt, a stronger standard. Because MyFitnessPal tracks eating habits, exercise routines, and behavioral patterns over time, the exposed data goes beyond basic credentials. Affected users faced a layered risk: account takeover through credential stuffing, targeted phishing using health and lifestyle context, and personal profiling tied to their fitness and nutrition histories. Under Armour disclosed the breach publicly and said MyFitnessPal forced password resets and disabled the compromised passwords. No significant regulatory action was publicly reported following the disclosure. For affected users, the practical risk remains elevated years later. Stolen credentials from this breach have circulated widely, meaning anyone who reused their MyFitnessPal password on other accounts should treat those accounts as potentially compromised.
ObscureIQ assessment: Credential reuse risk plus sensitive lifestyle profiling. Health-related data can be used for targeted scams or personal profiling.
Breach Impact
The 2018 breach was one of the largest consumer health-app credential exposures ever disclosed. Under Armour said an unauthorized party acquired MyFitnessPal account data in February 2018, and HIBP says the incident exposed 144 million unique email addresses along with usernames, IP addresses, and passwords stored as SHA-1 or bcrypt hashes; MyFitnessPal later said it forced password resets and disabled the old passwords. That made the breach highly useful for credential stuffing, password cracking against older accounts, phishing, and identity linkage tied to users’ health and fitness routines.
About MyFitnessPal
MyFitnessPal is a consumer health and fitness platform built around calorie tracking, nutrition logging, exercise monitoring, and behavior-change support. It operates as a large-scale wellness app that turns daily eating and activity habits into structured personal data, making it part health tool, part long-term behavioral record system.
Why They Hold Your Data
Health and fitness applications collect user accounts, emails, passwords, and behavioral data related to diet, exercise, and health routines.
Recent Developments
MyFitnessPal remains an active standalone consumer health product with a steady release cadence and visible product expansion in 2025 and 2026. Recent official updates highlight new nutrition-tracking features, recipe planning, photo-upload logging, sleep-related features, and GLP-1 support, which shows the platform continuing to deepen its role in day-to-day health management rather than remaining a static legacy app.
Data Points Exposed
4 verified field types
Email Address
IP Address
Password Critical
Username
Field names are shown in full for clarity and search visibility. Canonical machine keys are emitted only in this page’s structured data.
Exploitation & Downstream Threats
Threat Activity:Critical
Primary downstream threats:
- Credential stuffing against reused passwords across other platforms
- Targeted phishing campaigns using exposed email addresses
Threat vectors:
- Phishing, credential stuffing & account takeover
- Geolocation & account flagging
- Credential stuffing & account takeover
- Cross-platform tracking & credential stuffing
Recommended Actions
If you believe your information may be included:
Change Reused Passwords
Update this account and anywhere you reused the password; use a manager.
Enable MFA Everywhere
Turn on multi-factor authentication on email first, then financial accounts.
Report & Recover
If you spot misuse, start an official recovery plan and report fraud.
Frequently Asked Questions
What happened in the MyFitnessPal breach?▾
MyFitnessPal, owned by Under Armour at the time, suffered a data breach in February 2018 when an unauthorized party gained access to user account data. The breach exposed records tied to approximately 150 million users. The attack vector was a misconfiguration, meaning a security flaw in how the…
What data was exposed?▾
Verified fields include Email Address, IP Address, Password, Username.
What should I do if I was affected?▾
Change reused passwords, enable MFA, and (if identity or financial data is involved) freeze your credit and monitor your accounts.
Sources & References
Every claim on this page is traceable. This breach draws on:
Breach Index
Breach Index
Cross-source
9ghz
Cross-source
BreachForums_Official_Index
Cross-source
DataViper.io
Cross-source
Dehashed
Cross-source
leakfind
ObscureIQ Intelligence
ObscureIQ proprietary analysis
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